US spot crypto ETFs just went through their worst two-day stretch since June. Bitcoin funds lost $746.3 million across Tuesday and Wednesday, and when ether funds are added the combined exit reaches roughly $1.11 billion. Bitcoin is holding near $76,000, which is either resilience or denial depending on who you ask.
The numbers come from Farside Investors and SoSoValue, the two datasets most ETF desks watch. Tuesday, September 15, was the ugliest single session: $450.4 million left spot bitcoin funds, the largest one-day redemption since June 25. Fidelity’s FBTC bore the brunt with $214.8 million, BlackRock’s IBIT lost $161.7 million, Grayscale’s GBTC $44.1 million, ARK 21Shares’ ARKB $17.4 million and Bitwise’s BITB $12.4 million. Just a day earlier the same funds had taken in $159.9 million, so the swing was over $600 million in 24 hours.
Wednesday brought no relief. Spot bitcoin ETFs shed another $295.9 million. IBIT led again with $144.1 million in redemptions, ARKB lost $84.4 million, FBTC $52.7 million and GBTC $18.2 million. Only MSBT bucked the trend, taking in $3.5 million. Several smaller funds, including BITB, BTCO and the Grayscale Mini Trust, recorded no net flows at all.
The ether side got hit too
Ether funds, smaller but moving in the same direction, lost $224.1 million on Wednesday. Combined with the bitcoin figure, single-day redemptions crossed $520 million, and the two-day total for crypto ETFs overall lands at about $1.11 billion. For context, the same group of bitcoin funds pulled in $731 million in a single day earlier this month. The direction of travel has reversed hard.
| Session | BTC ETF net flow | ETH ETF net flow | Notable |
|---|---|---|---|
| Sept 15 | -$450.4M | – | FBTC -$214.8M, biggest day since June |
| Sept 16 | -$295.9M | -$224.1M | IBIT -$144.1M, ETHA led ether exits |
| Two-day total | -$746.3M | ~-$364M | Combined ~$1.11B |
Why the money left
Two things happened in quick succession. On September 16 the Federal Reserve raised rates a quarter point to 3.75-4%, its first hike since 2023, and penciled in another one before year end. Higher yields on boring instruments like Treasury bills make non-yielding assets look worse, and a firmer dollar does not help either. The 10-year Treasury yield has crossed 5% for the first time since 2007, and the G7 average sits at its highest level since mid-2008.
Then there is Washington. The Senate failed to advance the CLARITY Act in a 49-50 procedural vote on September 15, well short of the 60 votes needed. The bill would have drawn clearer lines between the SEC and CFTC over crypto oversight. Its failure left the market without the legislative clarity that had been priced in, at least partially, since the House started moving its own versions of the framework earlier this year. Roughly $633 million in crypto positions were liquidated around the vote, per market data trackers, as leveraged traders read the failure as a signal to de-risk.
“Higher interest rates can weigh on Bitcoin and other risk assets by increasing yields available on lower-risk investments and strengthening the dollar,” as one market analysis put it this week. The Senate’s failure to advance the CLARITY Act compounded the pressure.
ARK Invest, run by Cathie Wood, sold $65 million of crypto-linked holdings the day before the vote, led by $40 million of its own ARKB bitcoin ETF. Whether that was prescience or housekeeping, the timing looks sharp in hindsight.
The big holders are not all running
Here is the part that complicates the bearish read. Despite the outflow streak, BlackRock has been a net buyer of bitcoin through IBIT to the tune of $434.11 million over the 20 sessions ending September 16, according to SoSoValue data analyzed by Finbold. The fund now holds 782,623 BTC, worth about $59.28 billion. BlackRock’s ether vehicles have also kept buying: ETHA added $222.92 million and ETHB $186.7 million over the same window, bringing the firm’s combined ether ETF holdings to 3,864,678 ETH, worth roughly $8.46 billion on the ETHA side alone.
So the same asset manager that owns the fund bleeding the most redemptions is also the one accumulating the most on net over a longer horizon. That is less contradictory than it sounds. IBIT is the biggest fund, so it has the biggest flows in both directions. But it does suggest the redemptions are concentrated in shorter-term or momentum-driven money rather than a wholesale institutional retreat.
The 20-day picture also shows how lumpy these flows are. IBIT saw five days of inflows and eight of outflows in the window. A week that looks like a rout in daily data can still net out positive when a couple of $100-million-plus buying days land in the middle of it.
The price is holding, for now
Bitcoin slipped toward $75,000-76,000 as the outflows piled up but has clawed back to around $76,300, up modestly on the day. Ether trades near $2,435. After a 49-50 Senate loss and a hawkish Fed, holding flat is arguably a decent outcome. Bitcoin is still up roughly 19% over the past 30 days and ether about 28%, so the month’s gains have not been erased.
CoinDesk reported bitcoin rising 0.7% since midnight UTC to around $77,200 at one point Thursday, with 68 of the CoinDesk 100 constituents gaining, though the index remained 1.4% lower over 24 hours. Stablecoin market cap sits at about $290.6 billion, little changed, which matters because muted stablecoin growth was one of the flags analysts raised about the quality of the September rally in the first place.
The market is absorbing selling without breaking. Whether that continues depends on what comes next, and the calendar is not empty.
What to watch
Three things matter from here. First, whether the outflow streak extends to a third session. Two days is a wobble; five is a trend, and the funds already ran four consecutive outflow days from September 8 through 11 before Monday’s brief inflow. Second, the House. The Financial Services Committee did advance the American Reserve Modernization Act, a strategic bitcoin reserve bill, 28-21, and the Ways and Means Committee sent the Digital Asset Tax Certainty Act to the floor 38-5. Legislative momentum exists, just not in the Senate, and a House floor vote on the tax bill would be the first real test of whether anything crypto-adjacent can clear Congress this year.
Third, the Fed. Officials flagged one more hike this year, and the median year-end projection moved up. Every increment of hawkishness raises the yield floor under risk assets. Bitcoin spent most of 2026 trading as a macro-sensitive instrument, and this week was a reminder that when the Fed moves, leveraged crypto money moves faster.
There is also the structural question of who is on the other side of these redemptions. ETF creations and redemptions are matched by authorized participants, so heavy outflows force real selling of underlying bitcoin. That the price held above $75,000 while nearly $750 million exited the funds suggests natural buyers, possibly the same treasuries and accumulators that have been active all month, are absorbing the supply. Strive and Strategy, for instance, deployed a combined $513 million into bitcoin in a single week earlier this month, at nearly the same average price.
The honest read is that crypto is caught between a macro wall and a legislative stalemate, with ETF flows as the gauge. The gauge is pointing down. It has not pointed down for long enough to call the month’s rally dead, but the next few sessions will tell whether this was a flush or the start of something worse.
Live updates
Outflows extended through the September 17 session: US spot bitcoin ETFs lost another 20 million combined, led by 44 million from BlackRock's IBIT and 15 million from Fidelity's FBTC, bringing seven-day redemptions to about 12,061 BTC and 32,343 ETH.